#include<stdio.h>

#include"my_math.h"

int main(void) {

    int x = 100, y = 10;

    printf("%d + %d = %d\n", x, y, add(x, y));
    printf("%d * %d = %d\n", x, y, mul(x, y));
    printf("%d - %d = %d\n", x, y, sub(x, y));
    printf("%d / %d = %d\n", x, y, div(x, y));

    return 0;
}

/*

1. compile
gcc my_math.c my_math_test.c -o my_math_test

2. execute
./my_math_test

*/